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- W2923271144 abstract "Summary Lipid accumulation due to nitrogen depletion has been studied extensively in Chlamydomonas reinhardtii and the metabolic changes that lead to triacylglycerol biosynthesis have been of particular interest to researchers in the biodiesel industry. The induction of programmed cell death (PCD) in response to nitrogen starvation has also been documented in related chlorophytes. Here, we examined the temporal and metabolic overlap of lipid accumulation and PCD in response to nitrogen starvation in the important model organism C. reinhardtii . Nitrogen starvation induced physiological stress, measured by the progressive decline in chlorophyll a fluorescence, reduced photosynthetic efficiency and decreased growth. In keeping with previous reports, cells accumulated lipids reaching a peak after 2–3 days. At the same time, DNA nicking and caspase‐like protease activity was observed in a proportion of cells, and ultrastructural observations confirmed that death was via PCD. Our results demonstrate that DNA nicking and caspase‐like activity are observed during PCD in C. reinhardtii in response to nitrogen starvation, and that death occurs at the same time as lipid biosynthesis. Microalgal lipid production due to nitrogen depletion in C. reinhardtii is limited by the decrease in culture growth and knowing that the loss of culture density is, at least in part, due to PCD is important for the biotechnology industry." @default.
- W2923271144 created "2019-04-01" @default.
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- W2923271144 date "2019-03-19" @default.
- W2923271144 modified "2023-10-15" @default.
- W2923271144 title "Temporal and metabolic overlap between lipid accumulation and programmed cell death due to nitrogen starvation in the unicellular chlorophyte <i>Chlamydomonas reinhardtii</i>" @default.
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- W2923271144 doi "https://doi.org/10.1111/pre.12368" @default.
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